Switch components/password_manager code from IPC messages to Mojo.

ios/chrome/browser/passwords/credential_manager.mm

Index: ios/chrome/browser/passwords/credential_manager.mm
diff --git a/ios/chrome/browser/passwords/credential_manager.mm b/ios/chrome/browser/passwords/credential_manager.mm
index 7376962e22b7bc64d8a0c05d64ce73df58356c92..b0fa212b04970905ebcb3b9b2c22090fe62f9d23 100644
--- a/ios/chrome/browser/passwords/credential_manager.mm
+++ b/ios/chrome/browser/passwords/credential_manager.mm
@@ -117,7 +117,7 @@ void CredentialManager::CredentialsRequested(
   // Invoked when the page invokes navigator.credentials.request(), this
   // function will attempt to retrieve a Credential from the PasswordStore that
   // meets the specified parameters and, if successful, send it back to the page
-  // via SendCredential.
+  // via SendCredentialByID.
   DCHECK_GE(request_id, 0);
   password_manager::PasswordStore* store = GetPasswordStore();
 
@@ -139,7 +139,7 @@ void CredentialManager::CredentialsRequested(
   // available, send back an empty credential.
   if (zero_click_only && !IsZeroClickAllowed()) {
     base::MessageLoop::current()->PostTask(
-        FROM_HERE, base::Bind(&CredentialManager::SendCredential,
+        FROM_HERE, base::Bind(&CredentialManager::SendCredentialByID,
                               weak_factory_.GetWeakPtr(), request_id,
                               password_manager::CredentialInfo()));
     return;
@@ -161,8 +161,9 @@ void CredentialManager::CredentialsRequested(
   std::vector<std::string> realms;
   pending_request_.reset(
       new password_manager::CredentialManagerPendingRequestTask(
-          this, request_id, zero_click_only, page_url, true, federation_urls,
-          realms));
+          this, base::Bind(&CredentialManager::SendCredentialByID,
+                           base::Unretained(this), request_id),
+          zero_click_only, page_url, true, federation_urls, realms));
   store->GetAutofillableLogins(pending_request_.get());
 }
 
@@ -269,6 +270,12 @@ GURL CredentialManager::GetOrigin() const {
 }
 
 void CredentialManager::SendCredential(
+    const password_manager::SendCredentialCallback& send_callback,
+    const password_manager::CredentialInfo& credential) {
+  send_callback.Run(credential);
+}
+
+void CredentialManager::SendCredentialByID(
     int request_id,
     const password_manager::CredentialInfo& credential) {
   // Invoked when the asynchronous interaction with the PasswordStore completes,